2011 Particle Accelerator Conference - List of Authors (Flanagan, G.)

Paper	Title	Page
MOP032	High Pressure RF Cavity Test at Fermilab	160
	B.T. Freemire, P.M. Hanlet, Y. Torun IIT, Chicago, Illinois, USA G. Flanagan, R.P. Johnson, M. Notani Muons, Inc, Batavia, USA M.R. Jana, A. Moretti, M. Popovic, A.V. Tollestrup, K. Yonehara Fermilab, Batavia, USA D.M. Kaplan Illinois Institute of Technology, Chicago, Illinois, USA
	Funding: Supported in part by DOE STTR grant DE-FG02-08ER86350 Operating a high gradient radio frequency cavity embedded in a strong magnetic field is an essential requirement for muon beam cooling. However, a magnetic field influences the maximum RF gradient due to focusing of dark current in the RF cavity. This problem is suppressed by filling the RF cavity with dense hydrogen gas. As the next step, we plan to explore the beam loading effect in the high pressure cavity by using a 400 MeV kinetic energy proton beam in the MuCool Test Area at Fermilab. We discuss the experimental setup and instrumentation.

MOP038	Non-Magnetic Momentum Spectrometer Based on Fast Time-of-Flight System	169
	R.J. Abrams, C.M. Ankenbrandt, G. Flanagan, S.A. Kahn, M. Notani, T.J. Roberts Muons, Inc, Batavia, USA H.J. Frisch Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA
	Funding: Supported in part by SBIR Grant DE-SC0005445 A new generation of large-area, low cost time-of-flight detectors with time resolutions ≤ 10 ps and space resolutions ≤ 1 mm is being developed for use in nuclear and particle physics experiments, as well as for medical and industrial applications. Such detectors can serve as the basis for measuring momenta without requiring measurement of curvature in magnetic fields. Factors affecting measurement accuracy and simulation results are presented.

MOP040	Fast Time-of-Flight System for Muon Cooling Experiments	172
	R.J. Abrams, C.M. Ankenbrandt, G. Flanagan, S.A. Kahn, M. Notani, T.J. Roberts Muons, Inc, Batavia, USA H.J. Frisch Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA
	Funding: Supported in part by SBIR Grant DE-SC0005445. A new generation of large-area, low cost time-of-flight detectors with time resolutions ≤ 10 ps and space resolutions ≤ 1 mm is being developed for use in nuclear and particle physics experiments, as well as for medical and industrial applications. Such detectors are being considered for use in muon cooling channel tests. Designs and fabrication of prototype planes and associated readout electronics are described. Results of simulations of time and space resolutions are presented.

TUP092	Multi-purpose 805 MHz Pillbox RF Cavity for Muon Acceleration Studies	1003
	G.M. Kazakevich, G. Flanagan, R.P. Johnson, M.L. Neubauer, R. Sah Muons, Inc, Batavia, USA K.C.D. Chan, A.J. Jason, S.S. Kurennoy, H.M. Miyadera, P.J. Turchi LANL, Los Alamos, New Mexico, USA A. Moretti, M. Popovic, K. Yonehara Fermilab, Batavia, USA Y. Torun IIT, Chicago, Illinois, USA
	Funding: Supported by DOE grant DE-FG-08ER86352. An 805 MHz RF pillbox cavity has been designed and constructed to investigate potential muon beam acceleration and cooling techniques. The cavity can operate in vacuum or under pressure to 100 atmospheres, at room temperature or in an LN2 bath at 77 K. The cavity is designed for easy assembly and disassembly with bolted construction using aluminum seals. The surfaces of the end walls of the cavity can be replaced with different materials such as copper, aluminum, beryllium, or molybdenum, and with different geometries such as shaped windows or grid structures. Different surface treatments such as electro polished, high-pressure water cleaned, and atomic layer deposition are being considered for testing. The cavity has been designed to fit inside the 5-Tesla solenoid in the MuCool Test Area at Fermilab. Performance of the cavity, including initial conditioning and operation in the external magnetic field will be reported.

TUP153	Fabrication and Test of Short Helical Solenoid Model Based on YBCO Tape	1118
	M. Yu, V. Lombardo, M.L. Lopes, D. Turrioni, A.V. Zlobin Fermilab, Batavia, USA G. Flanagan, R.P. Johnson Muons, Inc, Batavia, USA
	Funding: Supported in part by USDOE STTR Grant DE-FG02-07ER84825 and by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. A helical cooling channel (HCC) is a new technique proposed for six-dimensional (6D) cooling of muon beams. To achieve the optimal cooling rate, the high field section of HCC need to be developed, which suggests using High Temperature Superconductors (HTS). This paper updates the parameters of a YBCO based helical solenoid (HS) model, describes the fabrication of HS segments (double-pancake units) and the assembly of six-coil short HS model with two dummy cavity insertions. Three HS segments and the six-coil short model were tested. The results are presented and discussed.

Paper

Title

Page

High Pressure RF Cavity Test at Fermilab

160

B.T. Freemire, P.M. Hanlet, Y. Torun
IIT, Chicago, Illinois, USA
G. Flanagan, R.P. Johnson, M. Notani
Muons, Inc, Batavia, USA
M.R. Jana, A. Moretti, M. Popovic, A.V. Tollestrup, K. Yonehara
Fermilab, Batavia, USA
D.M. Kaplan
Illinois Institute of Technology, Chicago, Illinois, USA

Funding: Supported in part by DOE STTR grant DE-FG02-08ER86350
Operating a high gradient radio frequency cavity embedded in a strong magnetic field is an essential requirement for muon beam cooling. However, a magnetic field influences the maximum RF gradient due to focusing of dark current in the RF cavity. This problem is suppressed by filling the RF cavity with dense hydrogen gas. As the next step, we plan to explore the beam loading effect in the high pressure cavity by using a 400 MeV kinetic energy proton beam in the MuCool Test Area at Fermilab. We discuss the experimental setup and instrumentation.

MOP038

Non-Magnetic Momentum Spectrometer Based on Fast Time-of-Flight System

169

R.J. Abrams, C.M. Ankenbrandt, G. Flanagan, S.A. Kahn, M. Notani, T.J. Roberts
Muons, Inc, Batavia, USA
H.J. Frisch
Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA

Funding: Supported in part by SBIR Grant DE-SC0005445
A new generation of large-area, low cost time-of-flight detectors with time resolutions ≤ 10 ps and space resolutions ≤ 1 mm is being developed for use in nuclear and particle physics experiments, as well as for medical and industrial applications. Such detectors can serve as the basis for measuring momenta without requiring measurement of curvature in magnetic fields. Factors affecting measurement accuracy and simulation results are presented.

MOP040

Fast Time-of-Flight System for Muon Cooling Experiments

172

R.J. Abrams, C.M. Ankenbrandt, G. Flanagan, S.A. Kahn, M. Notani, T.J. Roberts
Muons, Inc, Batavia, USA
H.J. Frisch
Enrico Fermi Institute, University of Chicago, Chicago, Illinois, USA

Funding: Supported in part by SBIR Grant DE-SC0005445.
A new generation of large-area, low cost time-of-flight detectors with time resolutions ≤ 10 ps and space resolutions ≤ 1 mm is being developed for use in nuclear and particle physics experiments, as well as for medical and industrial applications. Such detectors are being considered for use in muon cooling channel tests. Designs and fabrication of prototype planes and associated readout electronics are described. Results of simulations of time and space resolutions are presented.

TUP092

Multi-purpose 805 MHz Pillbox RF Cavity for Muon Acceleration Studies

1003

G.M. Kazakevich, G. Flanagan, R.P. Johnson, M.L. Neubauer, R. Sah
Muons, Inc, Batavia, USA
K.C.D. Chan, A.J. Jason, S.S. Kurennoy, H.M. Miyadera, P.J. Turchi
LANL, Los Alamos, New Mexico, USA
A. Moretti, M. Popovic, K. Yonehara
Fermilab, Batavia, USA
Y. Torun
IIT, Chicago, Illinois, USA

Funding: Supported by DOE grant DE-FG-08ER86352.
An 805 MHz RF pillbox cavity has been designed and constructed to investigate potential muon beam acceleration and cooling techniques. The cavity can operate in vacuum or under pressure to 100 atmospheres, at room temperature or in an LN2 bath at 77 K. The cavity is designed for easy assembly and disassembly with bolted construction using aluminum seals. The surfaces of the end walls of the cavity can be replaced with different materials such as copper, aluminum, beryllium, or molybdenum, and with different geometries such as shaped windows or grid structures. Different surface treatments such as electro polished, high-pressure water cleaned, and atomic layer deposition are being considered for testing. The cavity has been designed to fit inside the 5-Tesla solenoid in the MuCool Test Area at Fermilab. Performance of the cavity, including initial conditioning and operation in the external magnetic field will be reported.

TUP153

Fabrication and Test of Short Helical Solenoid Model Based on YBCO Tape

1118

M. Yu, V. Lombardo, M.L. Lopes, D. Turrioni, A.V. Zlobin
Fermilab, Batavia, USA
G. Flanagan, R.P. Johnson
Muons, Inc, Batavia, USA

Funding: Supported in part by USDOE STTR Grant DE-FG02-07ER84825 and by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
A helical cooling channel (HCC) is a new technique proposed for six-dimensional (6D) cooling of muon beams. To achieve the optimal cooling rate, the high field section of HCC need to be developed, which suggests using High Temperature Superconductors (HTS). This paper updates the parameters of a YBCO based helical solenoid (HS) model, describes the fabrication of HS segments (double-pancake units) and the assembly of six-coil short HS model with two dummy cavity insertions. Three HS segments and the six-coil short model were tested. The results are presented and discussed.